Dye.



UNITED STATES PATENT OFFICE.

OSCAR DRESSEL, O13 ELBERFEL'D, AND RICHARD KOTHE AND HEINRICH HDERLEIN. 0F VOHVVINKEL GERMANY, ASSIGNORS TO FARBENFABRIKEN VORM. FRIEDR. BAYER & CO, OI! ELBERFELD, GERMANY, A CORPORATION OF GERMANY.

DYEv

No Drawing.

To all whom it may concern:

lie it linown that we. ()smn Uni l'l'ionAno Ko'rim, and llillxnir'ii llorznii doctors oi philosophy, chemisls, cilizen; ol' 1' shades ins-i in light nml lo milling. ihe German limpirc. residing, res 'wcliwly, iii-ainn-ni: will] s1 Illlllfillr? :1 l' Elberfvlrh \"ohwinliel, and Volnvinlzcl, near llll'nn'i'eld, Kingdom of vlrnssia, Germany, have im'cnleil new Dye, of which lllc following is a specil'icuiion.

()Ul' invention relates to lihe ll'lllllllfzliil'llli. and producl'ion of new azo dyeslnii's snnuble for dyeing Wool which are obtained by (.(JU'J- bining the diam con'ipouiiids oi' anliliouryl sulfoi'nunids with naphthol sulionic acids.- The new dyestuffs are after being dried and pulverized in the shape of their alkaline salts from orange to reddish-brown powders soluble in Water and in concenlraied sulfuric acid with from -an orange lo red color; yielding upon reduction with slannous chlorid and hydrochloric acid an aininourylsulfonamid and an aminonapldhol sulfonic acid. They dye wool from orange to red shades which are remarkable for their excellent fasiness to milling, washing and light] In order to illustrate the new process more fully the following example is given, the parts being by Weight--25! parts of Lieluidin-Q-sulfonanilid:

are diazotized with 30 pares of H61 (19 B6.) and 6.9 parts of sodium nitrite. The diazo compound is then added to an aqueous solution, containing an excess of sodium carbonate of 25 paris, oi the sodium salt of 2- naphi hol-(i-sulfonic acid'. After the combi nation is complete common salt is added and the n coloring matter is filtered oil. It is after being dried and pulverized in the shape 'of its sodium salt a red powder,

Specification of Letters Patent.

Application filed October 21, 1910.

lwtcnted Apr. 18, 19! 1..

Serial No. 588,350.

soluble in waler and in \OIM'll'll-I'Rlfid sulfuric acid will) an orange din. wool from acid balli ln'illium orange even Upon willo- .llllllll' nciil ii. i?- l'onnnilid and ll'onic acid being The process is riieil out in ::'1= anal-lawn: manner on i|sii'1 ;.ollicr sulfonaimds r, oi'lho-a11isiilinmi'a-sulfonanilid (l ,I-l 05311, NH SO JNfilial-I 1'. i ll o'r-inoioluidiinpara--sulfontoluidid (CJLCH, M1,: so niro n c splil up,

44o] uid in -2-snl fonyl-lnaphthylaminor 5- sulfonic acid, 4 toluidin-2-sulfonyl-pare-sul-- i'anilic acid, 4:-tolnidin-2-sulfonyl-meiii-sub ianilic acid; the 2 naphiihol-(i-sulfonic acid. can be replaced by other nephihol sulfonic acids, 6. g. 1-naphtholior S-sulfonie acid, 2-11aphtho]-3.6-disulfonic acid, etc.

Vi e claim 1. The herein CiGSCI'llJBd new dyestuffs ob tainable by reacting upon naphthol e'ulfonio acids with diazolized aminoarylsulfonan iids, which dyes are after being dried and pulverized in the shape of their alkaline salts from orange to reddislrbrown powders solw ble in Water and in concentrated sulfuric acid with *n an orange to red color; yielding upon ti tnient with stannous chlorid and hydrochi c acid an aminoarylsulfonamid and an amino-naph1hol snlfonic acid and dyeing Wool from acid baths from orangre to red shades, sulistanl'ially as described.

2. 'he herein described new dyestufl' 0btainalf" by reacting upon 2-naphthol-6sulionic acid with diazotized i-toluidin-Q-suL fonanilid, hich is after being dried and l 1. d es 7 red. powder soluble in wnier and. in conceu- I set our hands in the presence of two sub- 10 tram} sul'hu'ic acid with an orange color; scribing Witnesses. yicldmg upon retina- 1:011 wlt'n stammus ch10- [11. J. [1,. LEIN. [1,.

fonzmi iifl and 'i-unin0-2lmphifhni-(3-su1funic acid and dyeing W001 from {mid baths briliiant on'mges shades, subsianLi-ally 4s dc- Witnessesr Sct'lbfid. CHAS. J. Vv'uwu'r, 111 testimm'ay whereof we have hereunto AL'FRl-H) HENKEL. 

